If you have any question on chem p6 im ready you guys. Don't Worry!!

[Yousif Mukkhtar]

For May June 2010, Paper 61, question 7:
http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s10_qp_61.pdf

Can some one explain to me why in the mark scheme it says "until goes pink"

 

[Lost_Life]

LOL

 

[JimmyCarter]

Guys, copper is always pink right?

when its first extracted its pink but then it changes to brown

 

[Yousif Mukkhtar]

when its first extracted its pink but then it changes to brown

Thanks.

 

[JimmyCarter]

therfore: B,A,C?

CAB

 

[JimmyCarter]

For May June 2010, Paper 61, question 7:
http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s10_qp_61.pdf

Can some one explain to me why in the mark scheme it says "until goes pink"

when it goes pink that means copper is being formed

 

[JimmyCarter]

http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s10_qp_62.pdf

Question 3 B...do I draw a simple curve graph? And do I miss out the anomalous point or do I include it? ( the point that doesn't fit the curve)

if its not in pattern with the curve dont include it. They usually ask which point seems to be inaccurate, so you say that point inaccurate

 

[Yousif Mukkhtar]

For question 7 here:
http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s10_qp_61.pdf
Can we write it like this:
1. Using a mortal and a pestle, crush the large lumps to smaller lumps.
2. Add a more reactive metal to it like magnesium.
3. Heat it.
4. Displacement reaction takes place where magnesium displaces copper out of copper carbonate.
5. Reaction stops when a pink solid is visible.
6. Copper can now be obtained.

All I am saying is, can we name the more reactive metal such as magnesium?

 

[JimmyCarter]

For question 7 here:
http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s10_qp_61.pdf
Can we write it like this:
1. Using a mortal and a pestle, crush the large lumps to smaller lumps.
2. Add a more reactive metal to it like magnesium.
3. Heat it.
4. Displacement reaction takes place where magnesium displaces copper out of copper carbonate.
5. Reaction stops when a pink solid is visible.
6. Copper can now be obtained.

All I am saying is, can we name the more reactive metal such as magnesium?

yeh its even better

 

[Lost_Life]

Guys i suggest you stop get some rest and pray
w inshallah we will get A-A*'s

 

[Yousif Mukkhtar]

Guys i suggest you stop get some rest and pray
w inshallah we will get A-A*'s

Exactly. I am resting for now.

Gonna leave the rest for tomorrow.

 

[Lost_Life]

Exactly. I am resting for now.

Gonna leave the rest for tomorrow.

yeah, i know, if people cram the info now they'll never be able to do well

 

[thats_me]

need a lil help... http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_w11_qp_63.pdf
question 3 part c ,, y will the solubility decrease?? :S

 

[Razo513]

View attachment 10406 is this the right answer???????

yes

 

[Razo513]

need a lil help... http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_w11_qp_63.pdf
question 3 part c ,, y will the solubility decrease?? :S

bases ingeneral are less soluble in hot water than cold water take it as a rule

 

[thats_me]

bases ingeneral are less soluble in hot water than cold water take it as a rule

ummm but CO2 is not a base :S

 

[IGCSE O/L student]

could you give me some tips like on how to know something like the solvent used in chromatography
or what do we conclude from a test of ion
or where do we place fire?

4 chromatography, we use water as da solvent.
we cn conclude wat a particular salt or salt solution contains
fire is always placed @ da bottom of da beaker or test tube

 

[IGCSE O/L student]

isnt burette and pipette very accurate?

burette is more accurate

 

[IGCSE O/L student]

no , a paper had a question saying suggest a suitable solvent for water-soluble fruit coloring's... i put ethanol,, but the answer is water

yes, water is da best solvent

 

[noura_elsaadany]

Okii Here In O/N 2011 PaPER 62 !! ...
First Question .. In The BoX the Answer Is Water .. ! Why It's Not Ethanol ?
AND also Part (b) In q.1 --- The Answer Is ( Magnesium Oxide ) .. WHY ??